F-Keys Demystified: What F1–F12 Do, with Examples

Let’s start with a quick overview of what each F-key typically does by default:

Various keyboards have dual functions for F-keys. For example, F2 might also lower screen brightness, or F7 might toggle airplane mode. By default, these alternate functions may take priority unless you hold down the Fn key.

Most keyboards also let you switch this behavior in the BIOS or system preferences, so you can choose whether your F-keys prioritize shortcuts or system controls.

Function keys, labeled F1 to F12, sit at the top row of most keyboards. These keys are designed to perform quick commands like refresh a webpage, save a file, toggle fullscreen mode, or open a new spreadsheet. Their behavior can vary depending on your operating system, app, or even your keyboard settings.

On Logitech® keyboards you can customize function key commands using Logi Options+ or G HUB software to trigger specific shortcuts, launch apps, or control media.

The F1 key typically opens the Help menu in almost every program. Whether you’re using Microsoft Word, your browser, or other desktop software, pressing F1 provides instant access to support resources and documentation in your active window. It’s a great way to troubleshoot or learn about features without navigating through menus. Some programs may redirect to online help pages.

The F2 key is commonly used to rename files or folders on Windows. Just click on a file and press F2 to quickly edit its name. In Microsoft Excel, pressing F2 allows you to edit the contents of the selected cell without double-clicking. It's a handy tool for quick edits during file management or spreadsheet work.

The F3 key opens the search feature in many apps, including File Explorer (previously known as Windows Explorer) and most internet browsers. It quickly moves your cursor to the search bar of your active window so you can start typing your query.

In some programs, pressing Shift + F3 will repeat the previous search or toggle search direction. It’s especially useful for scanning through large documents or folders.

When paired with the Alt key, Alt + F4 will close the current window or open application—one of the most common keyboard shortcuts. It’s a fast way to shut down programs without clicking the “X.” In Excel, F4 repeats the last action you performed, such as formatting or entering a formula. That small repetition function can really speed up tasks.

The F5 key function is to refresh content, such as reloading a webpage or refreshing a folder in File Explorer. It also starts a PowerPoint slideshow from the beginning, making it essential for presentations. In Excel, the F5 key is used for quickly navigating to a specific cell via the “Go To” dialog box.

If you’re wondering what the F5 shortcut key is on Mac computers, it may be mapped to brightness controls and require holding the Fn key to access the same functions. “Why is my F5 key not working?” you ask. You may need to disable Fn lock or adjust a setting using Logi Options+ if you’re using a customizable keyboard.

The F6 key helps with navigating between elements on a screen, especially in internet browsers. It cycles the focus between the address bar, browser tabs, bookmarks bar, and the webpage itself.

This is great for keyboard-based browsing without needing to use your mouse. It also works in some desktop apps to jump between interface sections.

Pressing F7 typically runs a spelling and grammar check in Microsoft Word and Outlook. It's a quick way to proof your writing before sharing a document or email.

In Firefox, it can toggle caret browsing, which allows you to navigate webpages with your keyboard. While not as commonly used as some other F-keys, it’s handy for writers and editors.

The F8 key was historically used to enter Safe Mode on Windows, especially in older versions like Windows 7. This made it a key tool for troubleshooting issues during startup.

In Word, F8 expands text selection: pressing it multiple times selects entire words, sentences, or paragraphs. On some Logitech keyboards, the F8 key may be programmed to control media playback, like pausing or skipping tracks.

The F9 key is frequently used in Microsoft Outlook to send and receive emails, updating your inbox. In Microsoft Word, it refreshes field codes, useful for dynamic content like dates or page numbers.

On Mac computers or with Logitech keyboards, what F9 is on the keyboard can vary; it's often used to toggle play/pause for media. This makes it a helpful key for both productivity and entertainment.

The F10 key activates the menu bar in many Windows applications, letting you navigate options using arrow keys. It’s especially useful in programs like Word or Excel for accessing ribbon commands. Pressing Shift + F10 acts like right clicking, opening the context menu for a selected item. That’s a useful shortcut for keyboard users.

The F11 key toggles full-screen mode in most web browsers, file explorers, and video players. Wondering what F11 is on your keyboard? It’s your best friend for distraction-free work or immersive media viewing. Press it once to enter full screen and again to exit. Some apps also use it to toggle layouts or views for focused workspaces.

Pressing F12 in Microsoft Word opens the “Save As” dialog, making it easy to save a copy of your document. In web browsers, Shift + F12 often opens developer tools for inspecting code or debugging. In Excel, F12 can launch the Visual Basic for Applications (VBA) editor, helpful for automating tasks with macros.

Many Logitech keyboards give you the flexibility to remap F-keys to better suit your workflow. Using the Logi Options+ app (for productivity keyboards) or G HUB software (for gaming keyboards) , you can assign custom actions like launching your favorite apps, opening specific folders, or even executing complex shortcuts.

It’s a simple way to streamline repetitive tasks and make your keyboard work smarter for your needs, especially if you rely on specific programs or workflows throughout the day.

The F1 to F12 keys might look like relics from another era, but don’t underestimate them—they're packed with time-saving functionality. Whether you're hitting F5 to refresh, toggling full screen with F11, or navigating without a mouse, these keys help streamline your day-to-day tasks. And if you’re using a Logitech keyboard, you can take it even further by customizing each key to your liking.

Take control of your function keys and learn how to enable direct access to F-keys so they trigger your preferred shortcuts without needing to press Fn. If you're troubleshooting a different key, such as Insert, check out this guide on why the Insert key may not work.